Shareholders' Equity - Share Repurchase Programs (Details) - Ordinary Options - November 2016 Share Repurchase Program $ / shares in Units, shares in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares
Stock Activity [Line Items]
Total amount authorized for repurchase of shares under share repurchase program	$ 1,500,000,000
Shares repurchased	$ 146,500,000
Shares repurchased (in shares) | shares	1.2
Average price of shares repurchased (in dollars per share) | $ / shares	$ 121.98
Remaining amount authorized for repurchase of shares	$ 431,200,000