Shareholders' Equity and Comprehensive Earnings - AOCI Activity (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 1,251
Stockholders' Equity Attributable to Parent, Ending Balance	3,713
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(183)
Other comprehensive earnings (loss) before reclassifications	(17)
Stockholders' Equity Attributable to Parent, Ending Balance	(200)
Pension and Other Postretirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(445)
Other comprehensive earnings (loss) before reclassifications	(37)
Amounts reclassified from accumulated other comprehensive earnings (loss)	76
Stockholders' Equity Attributable to Parent, Ending Balance	(406)
Effective Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(12)
Other comprehensive earnings (loss) before reclassifications	(10)
Amounts reclassified from accumulated other comprehensive earnings (loss)	12
Stockholders' Equity Attributable to Parent, Ending Balance	(10)
Accumulated Other Comprehensive Earnings (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Stockholders' Equity Attributable to Parent, Beginning Balance	(640)
Other comprehensive earnings (loss) before reclassifications	(64)
Amounts reclassified from accumulated other comprehensive earnings (loss)	88
Stockholders' Equity Attributable to Parent, Ending Balance	(616)
Divestment Business | Pension and Other Postretirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Amounts reclassified from accumulated other comprehensive earnings (loss)	$ 60