Stockholders' Equity - Schedule of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial losses attributable to redeemable noncontrolling interest	$ 1,000,000	$ 1,000,000
Other comprehensive income (loss) before reclassifications	320,000,000
Reclassified to income statement, net of income tax expense	1,000,000
Other Comprehensive Income (Loss), Net of Tax	321,000,000	(244,000,000)
Foreign currency translation adjustments arising during period, tax	0	12,000,000
Reclassified to income statement, tax	0	0
Unrealized gains on cash flow hedges arising during period, tax	0	0
Net actuarial loss and prior service cost arising during the period, tax	0	0
Amortization of actuarial loss and prior service costs, tax	0	1,000,000
Foreign currency translation adjustments and other, tax	0	0
Foreign Currency Translation Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	382,000,000	(275,000,000)
Reclassified to income statement, net of income tax expense	0	20,000,000
Other Comprehensive Income (Loss), Net of Tax	382,000,000	(255,000,000)
Unrealized Losses on Net Investment Hedges, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	(70,000,000)	0
Reclassified to income statement, net of income tax expense	0	0
Other Comprehensive Income (Loss), Net of Tax	(70,000,000)	0
Unrealized gains (losses) on net investment hedges arising during period, tax	44,000,000	0
Reclassified to income statement, tax	0	0
Unrealized Gains (Losses) on Cash Flow Hedges, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	14,000,000
Reclassified to income statement, net of income tax expense	0
Other Comprehensive Income (Loss), Net of Tax	14,000,000	0
Accumulated Defined Benefit Plans Adjustment, Net Prior Service and Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	0	0
Accumulated Defined Benefit Plans Adjustment, Amortization of Actuarial Loss, Prior Service Cost and Transition Obligation, Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	1,000,000	3,000,000
Accumulated Defined Benefit Plans, Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	(6,000,000)	8,000,000
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax	$ (5,000,000)	$ 11,000,000