Share-Based Awards (Details - Options) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
The activity related to the Company's share options as follows:
Outstanding at beginning of year	1,863,156
Granted	120,210	123,162	91,817
Exercised	(518,548)	(194,201)	(860,154)
Forfeited or expired	(6,965)
Outstanding at end of year	1,457,853	1,863,156
Exercisable at end of year	1,334,481
Vested and expected to vest at end of year	1,450,769
The weighted average exercise price is as follows:
Outstanding at beginning of year	$ 62.89
Granted	$ 70.82
Exercised	$ 56.92
Forfeited or expired	$ 66.86
Outstanding at end of year	$ 65.66	$ 62.89
Exercisable at end of year	$ 65.16
Vested and expected to vest at end of year	$ 65.63
Summary Of Option Activity [Abstract]
Weighted average grant date fair value of options granted	$ 7.90	$ 7.43	$ 10.29
Total intrinsic value of options exercised	$ 8.8	$ 4.6	$ 21.0
Proceeds from options exercised	29.3	10.6	37.2
Weighted average remaining contractual term	3 years 8 months 0 days
Aggregate intrinsic value of options outstanding, exercisable, vested and expected to vest	$ 22.1