ACQUISITIONS - Purchase Price Allocation (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
|
| Final purchase price allocations | |||
| Goodwill | $ 7,036 | $ 7,018 | |
| Series of individual business acquisitions | |||
| Final purchase price allocations | |||
| Current assets | 2 | $ 1 | |
| Property and equipment | 3 | 1 | |
| Other intangible assets | 1 | 2 | |
| Goodwill | 20 | 10 | |
| Other long-term assets | 1 | 0 | |
| Current liabilities | (1) | (2) | |
| Long-term liabilities | (1) | (1) | |
| Redeemable noncontrolling interests in equity of consolidated subsidiaries | (9) | 0 | |
| Noncontrolling interests | 0 | (3) | |
| Cash paid, net of cash acquired | (16) | (6) | |
| Gains on consolidations | 0 | 2 | |
| Transaction costs related to prospective and closed acquisitions | $ 2 | $ 2 | |