Condensed Consolidated Balance Sheets (Parenthetical) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013 USD ($)	Mar. 31, 2013 EUR (€)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 EUR (€)
Statement Of Financial Position [Abstract]
Trade and other receivables, allowances for doubtful accounts and sales returns	$ 43		$ 38
Common stock, par value		€ 0.07		€ 0.07
Common stock, shares authorized	1,185,800,000	1,185,800,000	1,185,800,000	1,185,800,000
Common stock, shares issued	375,160,653	375,160,653	362,733,010	362,733,010
Common stock, shares outstanding	374,947,526	374,947,526	362,519,883	362,519,883