Goodwill and Identifiable Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions |
9 Months Ended |
|
|
Sep. 30, 2016 |
Dec. 31, 2015 |
May 31, 2015 |
| Goodwill [Line Items] |
|
|
|
|
| Goodwill |
[1] |
$ 1,835.0
|
$ 1,755.3
|
|
| Other intangible assets, net of accumulated amortization |
|
1,113.9
|
996.7
|
|
| Plumbing [Member] |
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
| Goodwill |
[1] |
670.0
|
$ 578.6
|
|
| Increase in gross identifiable intangible assets due to acquisition |
|
140.7
|
|
|
| Norcraft Companies, Inc [Member] |
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
| Goodwill |
|
|
|
$ 290.6
|
| Norcraft Companies, Inc [Member] | Plumbing [Member] |
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
| Goodwill increase (decrease) due to acquisition-related |
|
$ 79.7
|
|
|
| Minimum [Member] | Tradenames and Customer Relationship [Member] |
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
| Amortizable identifiable intangible assets, estimated useful life |
|
3 years
|
|
|
| Maximum [Member] | Tradenames and Customer Relationship [Member] |
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
| Amortizable identifiable intangible assets, estimated useful life |
|
30 years
|
|
|
|
|