Shareholders' Equity and Comprehensive Earnings - AOCI Activity (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 3,435
Stockholders' Equity Attributable to Parent, Ending Balance	3,619
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(329)
Other comprehensive earnings (loss) before reclassifications	69
Stockholders' Equity Attributable to Parent, Ending Balance	(260)
Pension and Other Postretirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(590)
Other comprehensive earnings (loss) before reclassifications	(4)
Amounts reclassified from accumulated other comprehensive earnings (loss)	6
Stockholders' Equity Attributable to Parent, Ending Balance	(588)
Effective Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(22)
Other comprehensive earnings (loss) before reclassifications	33
Amounts reclassified from accumulated other comprehensive earnings (loss)	24
Stockholders' Equity Attributable to Parent, Ending Balance	35
Accumulated Other Comprehensive Earnings (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(941)
Other comprehensive earnings (loss) before reclassifications	98
Amounts reclassified from accumulated other comprehensive earnings (loss)	30
Stockholders' Equity Attributable to Parent, Ending Balance	$ (813)