1.0.0.3 false Consolidated Statements of Equity [Parentheticals] (USD $) false 1 $ false false Unit_1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit_2 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit_3 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit_4 Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false Unit_1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit_2 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit_3 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit_4 Standard http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false Unit_1 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit_2 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit_3 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit_4 Standard http://www.xbrl.org/2003/instance shares xbrli 0 2 Condensed Statements of Equity [Parentheticals] 0 psa_CondensedConsolidatedStatementsOfEquityParentheticals psa false na duration string Condensed Consolidated Statements of Equity [Parentheticals] false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false Condensed Consolidated Statements of Equity [Parentheticals] false 3 Repurchase of cumulative preferred shares, shares 1 us-gaap_StockRepurchasedDuringPeriodShares us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 982000 982000 false false 2 false true 852378 852378 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 4 Repurchase of Equity Shares, Series A 1 psa_RepurchaseOfEquitySharesSeries psa false na duration shares Value of Equity Shares, Series A that has been repurchased during the period. false false false false false false false false false 1 false true 0 0 false false 2 false true 367000 367000 false false 3 false true 0 0 false false Value of Equity Shares, Series A that has been repurchased during the period. No authoritative reference available. false 5 Issuance of common shares in connection with share-based compensation, shares 1 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap true na duration shares No definition available. false false false false false false false false false 1 false true 125807 125807 false false 2 false true 377453 377453 false false 3 false true 278008 278008 false false No definition available. No authoritative reference available. false 6 Equity Shares, Series A, depositary shares 1 psa_EquitySharesSeriesDepositaryShares psa false na duration decimal Equity Shares, Series A, depositary shares false false false false false false false false true 1 true true 2.45 2.45 false false 2 true true 2.45 2.45 false false 3 true true 2.45 2.45 false false Equity Shares, Series A, depositary shares No authoritative reference available. false 7 Common Shares 1 us-gaap_CommonStockDividendsPerShareDeclared us-gaap true na duration decimal No definition available. false false false false false false false false false 1 false true 2.20 2.20 false false 2 false true 2.80 2.80 false false 3 false true 2.00 2.00 false false No definition available. No authoritative reference available. false false 3 6 false UnKnown NoRounding UnKnown true true