Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaid expenses and other	$ 2,729		$ 2,729			$ 4,741
Inventories	1,580		1,580			1,605
Accounts payable and accrued liabilities	10,694		10,694			10,226
Other long-term liabilities	15,543		15,543			15,605
Deferred income taxes	1,670		1,670			2,490
Retained earnings	5,495		5,495			$ 5,459
Net revenues	8,278	$ 6,944	16,212	$ 13,482
Cost of products sold	1,934	1,529	3,861	3,145
Income tax expense	29	438	43	813
Net earnings	$ 1,983	$ 1,915	$ 4,766	$ 3,626
Diluted earnings per share (in dollars per share)	$ 1.26	$ 1.19	$ 2.99	$ 2.25
Accounting Standards Update 2017-07 | Operating earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of income		$ (12)		$ (24)
Accounting Standards Update 2017-07 | Other (income) expense, net
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of income		$ 12		$ 24
Non-operating income which would have been recorded in operating earnings under previous guidance	$ (14)		$ (18)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaid expenses and other	101		101		$ 42
Inventories	(54)		(54)		(39)
Accounts payable and accrued liabilities	(46)		(46)		(57)
Other long-term liabilities	(46)		(46)		(75)
Deferred income taxes	16		16		22
Retained earnings	131		131		124
Net revenues	(13)		30
Cost of products sold	(5)		16
Income tax expense	0		7
Net earnings	$ (8)		$ 7
Diluted earnings per share (in dollars per share)	$ 0.00		$ 0.00
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net revenues	$ 8,291		$ 16,182
Cost of products sold	1,939		3,845
Income tax expense	29		36
Net earnings	$ 1,991		$ 4,759
Diluted earnings per share (in dollars per share)	$ 1.26		$ 2.99
Retained earnings | Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment					(1,900)
Other assets | Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment					(500)
Prepaid expenses and other | Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment					$ (1,400)