Other Current Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Other Assets [Abstract]
Derivative Asset	$ 782		$ 782		$ 758
Deferred receivables consideration	661		661		513
Receivables from Customers	504		504		1,148
Financing Receivable, Net	301		301		352
Premiums Receivable, Net	695		695		584
Prepaid Expense, Current	214		214		406
Tax receivables	573		573		550
Other Receivables	518		518		288
Other current assets	460		460		687
Total other current assets	4,708		4,708		5,286
Financing Receivable, Allowance for Credit Losses	8		8		8
Interest on financing receivables	5	$ 5	17	$ 17
Reinsurance Recoverables	$ 250		$ 250		$ 272