Description of Business (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Reportable Segments
Number of reportable segments | segment									3
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Revenues	$ 2,381	$ 1,512	$ 1,641	$ 1,965	$ 2,043	$ 1,618	$ 1,631	$ 1,726	$ 7,500	$ 7,017	$ 6,608
Operating income	$ 694	$ 265	$ 434	$ 595	$ 221	$ 257	$ 339	$ 493	1,988	$ 1,309	$ 1,412
Bungie, Inc. - Destiny Publishing Rights
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Revenues									164
Operating income									$ 91