Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Valuation allowance	$ 150	$ 135
Foreign earnings for prior years not indefinitely reinvested	35
Foreign unremitted earnings	9,300	8,500
Estimated federal and state income tax amounts net of applicable credits on foreign unremitted earnings	$ 2,600	$ 2,400
Effective income tax rate	(0.20%)	8.20%	6.70%
Net interest and penalties	$ 6	$ 3	$ 12
Unrecognized interest and penalties expense	11	56
Unrecognized tax benefits that, if recognized, would impact effective tax rate	82
Gross unrecognized tax benefit liability	74	209
Net indemnification receivables	28	$ 93
Decrease in gross unrecognized tax benefits	$ 75
Impact on earnings per diluted share	$ 0.23	$ 0.24	$ 0.20
Expected reduction in uncertain tax positions	$ 10
Baxalta Inc
Income Taxes [Line Items]
Decrease in gross unrecognized tax benefits	37
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Payment made for partially settlement on U.S. federal income tax audit for the period 2008-2013	$ 303
Discontinued Operations
Income Taxes [Line Items]
Decrease in gross unrecognized tax benefits		$ (10)
Earliest Tax Year | Internal Revenue Service (IRS)
Income Taxes [Line Items]
Income tax period under audit	2008
Earliest Tax Year | Federal Ministry of Finance, Germany
Income Taxes [Line Items]
Income tax period under audit	2008
Earliest Tax Year | Ministry of Economic Affairs and Finance, Italy
Income Taxes [Line Items]
Income tax period under audit	2010
Latest Tax Year | Internal Revenue Service (IRS)
Income Taxes [Line Items]
Income tax period under audit	2013
Latest Tax Year | Federal Ministry of Finance, Germany
Income Taxes [Line Items]
Income tax period under audit	2011
Latest Tax Year | Ministry of Economic Affairs and Finance, Italy
Income Taxes [Line Items]
Income tax period under audit	2012
Domestic Tax Authority
Income Taxes [Line Items]
Operating loss carryforwards	$ 887
Foreign tax credit carryforwards	$ 332
Domestic Tax Authority | Earliest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration dates	2018
Tax credit carryforwards, expiration dates	2017
Domestic Tax Authority | Latest Tax Year
Income Taxes [Line Items]
Operating loss carryforwards, expiration dates	2036
Tax credit carryforwards, expiration dates	2034
Foreign Tax Authority
Income Taxes [Line Items]
Operating loss carryforwards	$ 1,400
Foreign tax credit carryforwards	48
Foreign Tax Authority | Tax Year 2017
Income Taxes [Line Items]
Operating loss carryforwards	$ 38
Operating loss carryforwards, expiration dates	2017
Foreign Tax Authority | Tax Year 2018
Income Taxes [Line Items]
Operating loss carryforwards	$ 18
Operating loss carryforwards, expiration dates	2018
Foreign Tax Authority | Tax Year 2019
Income Taxes [Line Items]
Operating loss carryforwards	$ 20
Operating loss carryforwards, expiration dates	2019
Foreign Tax Authority | Tax Year 2020
Income Taxes [Line Items]
Operating loss carryforwards	$ 41
Operating loss carryforwards, expiration dates	2020
Foreign Tax Authority | Tax Year 2021
Income Taxes [Line Items]
Operating loss carryforwards	$ 28
Operating loss carryforwards, expiration dates	2021
Foreign Tax Authority | Tax Year After 2021
Income Taxes [Line Items]
Operating loss carryforwards	$ 293
Operating loss carryforwards, expiration dates	After 2021
Foreign Tax Authority | Tax Year No Expiration
Income Taxes [Line Items]
Operating loss carryforwards	$ 1,000
Operating loss carryforwards, expiration dates	No expiration date