Consolidated Statement of Comprehensive Income (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Net income including noncontrolling interest $ 1,201 $ 1,225
Other comprehensive income (loss), net of tax:    
Cumulative translation adjustment (193) 20
Defined benefit pension and postretirement plans adjustment 91 61
Debt and equity securities - unrealized gain (loss) 0 1
Cash flow hedging instruments - unrealized gain (loss) 70 2
Total other comprehensive income (loss), net of tax (32) 84
Comprehensive income (loss) including noncontrolling interest 1,169 1,309
Comprehensive (income) loss attributable to noncontrolling interest (2) (30)
Comprehensive income (loss) attributable to 3M $ 1,167 $ 1,279