Equity Equity (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 € / shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 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 | shares				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	$ (250.0)
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $				$ 750.0
Preferred Stock [Member]
Preferred Stock, Shares Authorized | shares				10,000,000
Ordinary shares
Common Stock, Shares Authorized | shares				1,175,000,000
Euro Member Countries, Euro
Common Stock, Shares Authorized | shares				40,000
Common Stock, Par or Stated Value Per Share | € / shares			€ 1.00