Commitments and Contingencies - Guarantees (Details) $ in Millions	Mar. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	$ 280
Recorded Liability for Guarantees	59
Debt service
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	156
Recorded Liability for Guarantees	23
Operating profit
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	116
Recorded Liability for Guarantees	34
Other
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	8
Recorded Liability for Guarantees	$ 2