Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Operating Revenue	$ 14,768	$ 14,314	$ 13,599
Cost of revenue	8,604	8,306	7,908
Selling, administrative, and research and development expenses	2,391	2,412	2,411
Legal settlement (income)	0	(95)	0
Amortization and impairment of intangible assets	189	206	224
Operating Income	3,584	3,485	3,056
Interest expense	(257)	(260)	(237)
Other income (expense)	67	45	89
Income Before Taxes	3,394	3,270	2,908
Income taxes	831	1,583	873
Net Income	$ 2,563	$ 1,687	$ 2,035
Net Income Per Share:
Basic (in dollars per share)	$ 7.65	$ 4.90	$ 5.73
Diluted (in dollars per share)	$ 7.60	$ 4.86	$ 5.70