Risk Management - Foreign Currency Risk (Details) $ in Millions	Sep. 26, 2020 USD ($) position	Dec. 31, 2019 USD ($) position
Derivative [Line Items]
Number of net notional positions to buy or sell foreign currency disclosed (in number of positions) | position	5	5
Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	$ 1,000	$ 1,100
Foreign Exchange Contract | Euro | Long
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	196	134
Foreign Exchange Contract | British pound | Long
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	134	107
Foreign Exchange Contract | Norwegian krone | Long
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	29	32
Foreign Exchange Contract | Australian dollar | Short
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	93	123
Foreign Exchange Contract | Chinese renminbi | Short
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	$ 77	$ 79