Segment Information - Net Sales Attributed to Foreign Countries (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 43,741		$ 32,714		$ 30,404		$ 29,128		$ 35,747		$ 25,358		$ 23,185		$ 22,717		$ 135,987	$ 107,006	$ 88,988
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales																	90,349	70,537	54,717
Germany
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales																	14,148	11,816	11,919
Japan
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales																	10,797	8,264	7,912
United Kingdom
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales																	9,547	9,033	8,341
Rest of World
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales																	$ 11,146	$ 7,356	$ 6,099

[1] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted-average shares outstanding for each period.