Equity Equity (Narrative) (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 € / shares	Dec. 31, 2019 shares	Oct. 31, 2018 USD ($)
Common Stock, Par or Stated Value Per Share | $ / shares	$ 1.00
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.001
Capital Units, Authorized	1,185,040,000
Stock Repurchase Program, Authorized Amount | $					$ 1,500.0
Stock Repurchased During Period, Value | $	$ 0.0
Repurchase of ordinary shares | $	0.0	$ (500.1)
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $	$ 750.0
Preferred Stock [Member]
Preferred Stock, Shares Authorized	10,000,000
Preferred Stock, Shares Outstanding	0			0
Preferred Stock, Shares Outstanding	0			0
Ordinary shares
Common Stock, Shares Authorized	1,175,000,000
Euro Member Countries, Euro
Common Stock, Shares Authorized	40,000
Common Stock, Par or Stated Value Per Share | € / shares			€ 1.00
Common Stock, Shares, Outstanding	0			0
Common Stock, Shares, Outstanding	0			0